The teaching building of Xinqu Primary School has 4 floors, each floor has 3 classrooms, and there are 6 goldfish in the natural corner of each classroom on average. How many goldfishes are there in the natural corners of these classrooms?
新区小学的教学楼有4层，每层有3个教室，平均每个教室的自然角有6条金鱼．这些教室的自然角一共有多少条金鱼？
<gadget id="calculator">6 * 3 * 4</gadget>
<output>72</output>

<result>72</result>