Xiaohong’s house has 2 large fish tanks and 1 small fish tank. Each big fish tank has 6 goldfish, and the small fish tank has 3 goldfish. How many goldfish does Xiaohong’s house have in total?
小红家有2个大鱼缸和1个小鱼缸，每个大鱼缸养了6条金鱼，小鱼缸里养了3条金鱼，小红家共养了多少条金鱼？
<gadget id="calculator">6 * 2</gadget>
<output>12</output>

<gadget id="calculator">3 * 1</gadget>
<output>3</output>

<gadget id="calculator">12 + 3</gadget>
<output>15</output>

<result>15</result>