A township's total output of green vegetables last year was 6.4 million kilograms, and this year's output is 62.5% of last year's total output of green vegetables. How much is the total output of green vegetables this year?
一个乡去年绿色蔬菜总产量640万千克，今年的是去年绿色蔬菜总产量的62.5%．今年绿色蔬菜总产量是多少万千克？
<gadget id="calculator">62.5 / 100</gadget>
<output>0.625</output>

<gadget id="calculator">640 * 0.625</gadget>
<output>400</output>

<result>400</result>