There are 45 passengers in each bus, 21 passengers in each passenger car, and 6 passenger cars and 6 passenger cars respectively. How many people can be seated in total?
大客车每车载45人，小客车每车载21人，大客车和小客车各6辆，一共可以坐多少人？
<gadget id="calculator">45 * 6</gadget>
<output>270</output>

<gadget id="calculator">21 * 6</gadget>
<output>126</output>

<gadget id="calculator">270 + 126</gadget>
<output>396</output>

<result>396</result>