I want to round up my integer number in javascript, here the case.

i have a code for calculating

document.getElementById("finalNumber").value = (((varNum1 * 0.09) * varNum2 / 12)/varNum3);

the finalNumber return = 918740

how can i change the return into 918800 so the 740 into 800, for another example if the finalNumber return 918800 it should be not change.