There are 4 groups of boys and girls standing in line. There are 37 boys in each row and 63 girls in each row. How many people are there in total?
同学们站队男生女生都是4行，男生每行37人，女人每行63人，一共多少人？
<gadget id="calculator">37 * 4</gadget>
<output>148</output>

<gadget id="calculator">63 * 4</gadget>
<output>252</output>

<gadget id="calculator">148 + 252</gadget>
<output>400</output>

<result>400</result>