Every 30 square meters of woods can absorb 120 grams of harmful gases in the air every year. The area of the green belt in Longchuan Square is 2440 square meters. How many grams of harmful gases can be absorbed in a year?
每30平方米的树林每年可吸收空气中有害气体120克，龙川广场绿化带的面积是2440平方米，一年可以吸收有害气体多少克？
<gadget id="calculator">120 / 30</gadget>
<output>4</output>

<gadget id="calculator">4 * 2_440</gadget>
<output>9_760</output>

<result>9_760</result>