-- Find out the mass, in kilograms.
Write down the number, with the unit "kg" after it.
-- Find out the gravitational acceleration where you are.
If you are on Earth, then it's 9.8 meters per second squared.
Write down the number, with the unit " m/s² " after it.
-- Multiply the two quantities you have written down.
..... Multiply the numbers and write down their product.
..... Write the unit " kg-m/s² " after it.
-- If you wish, you may replace the unit ' kg-m/s² '
with its equivalent unit: ' Newton '.
The result of this operation is a force.