Lin Ling is practicing running. She ran 3 laps along a rectangular playground that is 100 meters long and 70 meters wide. How many meters did she run in total?
林玲练习跑步．她沿着长100米、宽70米的长方形操场跑了3圈，一共跑了多少米？
<gadget id="calculator">100 + 70</gadget>
<output>170</output>

<gadget id="calculator">170 * 2 * 3</gadget>
<output>1_020</output>

<result>1_020</result>