There is a small triangular flag with an area of (3/10) square meters. Its base is (4/5) meters, what is its height in meters
有一面三角形小旗，面积是(3/10)平方米．它的底是(4/5)米，高是多少米
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">2 / (4/5)</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">(3/10) * (5/2)</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>