Uncle Zhang harvested 447kg of corn this year, which is 7kg more than last year (4/3). How many kilograms of corn did Uncle Zhang harvest last year?
张叔叔今年收玉米447kg，今年比去年的(4/3)还多7kg，张叔叔去年收玉米多少kg？
<gadget id="calculator">447 - 7</gadget>
<output>440</output>

<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">440 / (4/3)</gadget>
<output>330</output>

<result>330</result>