The workshop has produced 2,000 colored pens, each of which is packed in a box of 12. After packing 150 boxes, how many are left?
车间生产了2000支彩笔，每12支装一盒，装了150盒后，还剩多少支？
<gadget id="calculator">12 * 150</gadget>
<output>1_800</output>

<gadget id="calculator">2_000 - 1_800</gadget>
<output>200</output>

<result>200</result>