<html><body><form oninput="op.value = x.valueAsNumber * y.valueAsNumber"> <input name=x type=number >* <input name=y type=number >= <output name=op for="x y"></output> </form></body></html> <html><body><form oninput="op.value = x.valueAsNumber * y.valueAsNumber"> <input name=x type=number >* <input name=y type=number >= <output name=op for="x y"></output> </form></body></html>