How can i divide a number from a list to smaller pieces

i am new to python and trying to make a program that divides a number into pieces (pieces will be random) with 2 conditions.

I have manage to make a program to do so but as soon as i make changes to demo data my program doesn't work as expected.

Here is the code

import random

qtl = [100, 200 , 500]
prices = [10 , 20, 5]
total = qtl[0] * prices[0]
pieces = []
prices_for_pieces = []
max = 1000

for index in range(3):
    total = qtl[index] * prices[index]
    print(f' now {qtl[index]}')
    if  total  > max:
            number_of_piece = int((total/max) +1)
            temp_qtl = qtl[index]
            if temp_qtl > 0:
                counter = 1
                for i in range(number_of_piece):

                    if counter == number_of_piece:
                        #runs at last range to add remaining piece to the list
                        price = int(random.uniform((prices[index] / 1.05) , (prices[index] / 1.1)))
                        prices_for_pieces.append(price)
                        pieces.append(temp_qtl)
                    else:
                        #to make piece and add them to pieces
                        counter = counter + 1
                        new_qtl = int(random.uniform((qtl[index]/(number_of_piece * 2)),(qtl[index]/number_of_piece)))
                        temp_qtl = temp_qtl - new_qtl
                        print(new_qtl)
                        print(f' remain {temp_qtl} out of {qtl[index]}')
                        price = random.uniform((prices[index] / 1.05) , (prices[index] / 1.1))
                        prices_for_pieces.append(price)
                        pieces.append(new_qtl) 
    else:
        price = random.uniform((prices[index] / 1.05) , (prices[index] / 1.1))
        prices_for_pieces.append(price)
        pieces.append(qtl[index])   


# stats 
print(pieces)
print(len(pieces))
print(prices_for_pieces)
print(len(prices_for_pieces))
last = len(pieces)

# making sure if  it follows 'max' condition
for i in range(last):
    print(f'{pieces[i]} X {prices_for_pieces[i]} = {pieces[i] * prices_for_pieces[i]}')

If i do

 qtl = [450, 20, 150]
 prices = [100, 12000, 400]

It doesn't work with my if condition