tests = input()
output = []

for i in xrange(tests):
    inputs = raw_input()
    inputs = inputs.split()
    for i,n in enumerate(inputs):
        inputs[i] = int(n)
    N, C, M = inputs

    choc = wrap = N/C
    while wrap >= M:
        choc += wrap/M
        wrap = wrap/M + wrap%M
    output.append(choc)

for o in output:
    print o