The school bought 45 boxes of colored chalk and 55 boxes of white chalk, 40 sticks in each box, how many sticks of chalk are there in total?
学校买来45盒彩色粉笔和55盒白粉笔，每盒40枝，一共有多少枝粉笔？
<gadget id="calculator">45 + 55</gadget>
<output>100</output>

<gadget id="calculator">40 * 100</gadget>
<output>4_000</output>

<result>4_000</result>