Jackson had 20 kilograms of meat. He used 1/4 of the meat to make meatballs and used 3 kilograms of meat to make spring rolls. How many kilograms of meat are left?
Jackson used 20 x 1/4 = 
<gadget id="calculator">20*1/4</gadget>
<output>5</output>
5 kilograms of meat to make meatballs.
He had 20 - 5 = 
<gadget id="calculator">20-5</gadget>
<output>15</output>
15 kilograms of meat left.
So 15 - 3 = 
<gadget id="calculator">15-3</gadget>
<output>12</output>
12 kilograms of meat are left.

<result>12</result>