A food processing factory makes a plastic bag with a length of 40 cm and a width of 30 cm. A total of 200 bags are made. How many square meters of such plastic paper are needed?
食品加工厂做一种塑料袋，长40厘米，宽30厘米，一共做了200个，共需要这样的塑料纸多少平方米．
<gadget id="calculator">200 / 10_000</gadget>
<output>1/50 = around 0.02</output>

<gadget id="calculator">40 * 30 * (1/50)</gadget>
<output>24</output>

<result>24</result>