Uncle Zhang's house has a rectangular chrysanthemum field, 30m long and 22m wide. Last year, 2 kg of chrysanthemums were harvested per square meter. How many kg of chrysanthemums were harvested in this field last year?
张叔叔家有一块长方形的菊花地，长30m，宽22m．去年每平方米收菊花2kg，这块地去年收菊花多少kg？
<gadget id="calculator">30 * 22 * 2</gadget>
<output>1_320</output>

<result>1_320</result>