let's figure out how many trips Jabu will need to make to move all the soil! If he can only fill the bucket with 7 litres of soil at a time, we can divide the total amount of soil (10 litres) by the amount he can carry in one trip (7 litres).
10 litres ÷ 7 litres = 1.42 trips
Since we can't have a fraction of a trip, Jabu will need to make 2 trips to move all the soil.
