A and B make parts, A makes 55 parts per hour, and B makes 62 parts per hour. They work together for 4 hours. How many parts are they made in total? (solution in two ways)
甲、乙两人做零件，甲每小时做55个，乙每小时做62个，他们一起做了4小时，一共做了多少个零件？(用两种方法解)
<gadget id="calculator">55 * 4</gadget>
<output>220</output>

<gadget id="calculator">62 * 4</gadget>
<output>248</output>

<gadget id="calculator">220 + 248</gadget>
<output>468</output>

<result>468</result>