To make a cloth bag with a length (2/3) meter and a width (2/5) meter, at least how many square meters of cloth are needed?
做一个长(2/3)米，宽(2/5)米的布袋，至少需要多少平方米的布？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(2/3) * (2/5) * 2</gadget>
<output>8/15 = around 0.533333</output>

<result>8/15 = around 0.533333</result>