Paul needs 63 cupcakes for a birthday party happening on Saturday. He already has 8 chocolate cupcakes and 40 toffee cupcakes. How many more cupcakes should Paul buy?
The total number of chocolate and toffee cupcakes is 8 + 40 = 
<gadget id="calculator">8+40</gadget>
<output>48</output>
48.
Paul should buy 63 - 48 = 
<gadget id="calculator">63-48</gadget>
<output>15</output>
15 more cupcakes.

<result>15</result>