An illustration of the process detailed above: Divide by 4853 by 1000, note the whole number 4, then take the decimal part 0.863 to the next step.  Multiply by 10, note the whole number 8, and take the decimal part 0.63 to the next step.  Multiply by 10, note the whole number 6, and take the decimal part 0.3 to the next step. Multiply by 10 to get the whole number 3.  The whole number parts we noted form the number 4863.