import sys

def divide(a, b, n):
    int_part = a // b
    rem = a % b
    decimals = []
    for _ in range(n):
        if rem == 0:
            decimals.append('0')
            continue
        rem *= 10
        digit = rem // b
        decimals.append(str(digit))
        rem %= b
    return f"{int_part}.{''.join(decimals)}"

input_data = sys.stdin.read().split()

i = 0
while i + 2 < len(input_data):
    a = int(input_data[i])
    b = int(input_data[i+1])
    n = int(input_data[i+2])
    
    print(divide(a, b, n))
    i += 3

import sys
from decimal import Decimal, getcontext
from decimal import ROUND_DOWN

getcontext().prec = 10010

for line in sys.stdin:
    parts = line.strip().split()
    if len(parts) != 3:
        continue
    a = int(parts[0])
    b = int(parts[1])
    n = int(parts[2])
    quotient = Decimal(a) / Decimal(b)
    scale = Decimal('1e-' + str(n))
    result = quotient.quantize(scale, rounding=ROUND_DOWN)
    print(f"{result:.{n}f}")