The perimeter of a rectangle is (4/7) m, the length is (1/5) m, what is the area in square meters? (Using a different method to find width)
一个长方形的周长是(4/7)m，长是(1/5)m，面积是多少平方米？(用不同的方法求宽)
<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(1/5) * 2</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(4/7) - (2/5)</gadget>
<output>6/35 = around 0.171429</output>

<gadget id="calculator">(6/35) / 2</gadget>
<output>3/35 = around 0.085714</output>

<gadget id="calculator">(3/35) * (1/5)</gadget>
<output>3/175 = around 0.017143</output>

<result>3/175 = around 0.017143</result>