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For quick reference;
Int(y/x)*x rounds y to the lower x
(Int(y/x)+1)*x rounds y to the higher x
Int(y/x+0.5)*x rounds y to the nearer x
Int(y/x)*x rounds y to the lower x
(Int(y/x)+1)*x rounds y to the higher x
Int(y/x+0.5)*x rounds y to the nearer x