var c = 100;
var m = 113;
document.writeln(Math.ceil (m / c) * c);
document.writeln(Math.round(m / c) * c);
document.writeln(Math.floor(m / c) * c);
var n = 355;
document.writeln(Math.ceil (n / c) * c);
document.writeln(Math.round(n / c) * c);
document.writeln(Math.floor(n / c) * c);
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