Multiplying 4000000 * 4000000 gives you 1.6e13 which is a scientific way of saying 1.6 times 10 to the 13th power or 1.6 multiplied by 10,000,000,000,000. When multiplkying numbers of this type (a number followed by a bunch of zeros), you can just multiply the beginning non zero part (4 * 4 = 16) and follow it with the total number of zeros (there are 12 zeros giving you the same number as above: 16,000,000,000,000.
4000000
4000000 pennies is exactly 4000000 pennies.
4000000-150000 = 3850000
$800,00020% of $4000000= 20% * $4000000= 0.20 * $4000000= $800000
4000000 = 4*106
It is 4000000.
4000000/1000 = 4000
400000
40 x 4000000 = 160000000
93023.2558
4000000 + 6 = 4000006
4000000 in decimal notation is 4.0 x 10 ^ 6.