Due to floods in a certain area, the grain harvest was 30% less than last year. The region harvested 7,200 tons of grain last year. How many tons of grain will it harvest this year?
某地区由于遭受水灾，粮食比去年少收了三成．该地区去年收粮食7200吨，今年收粮食多少吨？
<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (3/10)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">2_700 * (7/10)</gadget>
<output>1_890</output>

<result>1_890</result>