Tommy ordered a total weight of 10 kilograms of apple, orange, grape, and strawberry fruits. He ordered 3 kilograms of apples, 1 kilogram of orange, and 3 kilograms of grapes. How many kilograms of strawberries did he order?
Tommy ordered 3 + 3 + 1 = 
<gadget id="calculator">3+3+1</gadget>
<output>7</output>
7 kilograms of apples, oranges and grapes altogether.
Therefore, Tommy ordered 10 - 7 = 
<gadget id="calculator">10-7</gadget>
<output>3</output>
3 kilograms of strawberries.

<result>3</result>