workshop produced 320 washing machines in the first 8 days, and then produced 45 washing machines per day for the next 12 days. How many washing machines are produced in this workshop?
一个车间前8天生产了320台洗衣机，以后12天每天生产45台．这个车间共生产洗衣机多少台？
<gadget id="calculator">45 * 12</gadget>
<output>540</output>

<gadget id="calculator">320 + 540</gadget>
<output>860</output>

<result>860</result>