The perimeter of an isosceles triangle is (5/8)m, one side is (1/5)m long, and what is the base in m.
等腰三角形的周长是(5/8)m，一条腰长(1/5)m，底是多少m．
<gadget id="calculator">5 / 8</gadget>
<output>5/8 = around 0.625</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">(5/8) - (2/5)</gadget>
<output>9/40 = around 0.225</output>

<result>9/40 = around 0.225</result>