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374 / 9 = 41.6 (from calculator )

if in c++, it will become 374 / 9 = 41.555

how do i make the final calculation become 41.6 ?

i've tried ceil() and setprecision(1) , the answer i got quite big different compare with the answer from calculator.

answer from ceil()

42 * 15.85 = 665.70

answer from setprecision(1), nothing change, it only works for print out

41.55 * 15.85 = 658.56

answer from calculator

41.6 * 15.85 = 659.36