arrChocolates = []
chocolates = 0
for _ in range(int(input())):
	dollars,price,chocltWrapr = map(int,input().split())
	chocolates = dollars // price
	wrapper = chocolates
	while wrapper >= chocltWrapr:
		chocolates += 1
		wrapper = wrapper - chocltWrapr
		wrapper += 1
	arrChocolates.append(chocolates)

for i in arrChocolates:
	print(i)