Simple calculation (7/13)*(1/8)+(1/8)*(6/13).
简便计算(7/13)*(1/8)+(1/8)*(6/13)．
<gadget id="calculator">7 / 13</gadget>
<output>7/13 = around 0.538462</output>

<gadget id="calculator">1 / 8</gadget>
<output>1/8 = around 0.125</output>

<gadget id="calculator">(7/13) * (1/8)</gadget>
<output>7/104 = around 0.067308</output>

<gadget id="calculator">6 / 13</gadget>
<output>6/13 = around 0.461538</output>

<gadget id="calculator">(1/8) * (6/13)</gadget>
<output>3/52 = around 0.057692</output>

<gadget id="calculator">(7/104) + (3/52)</gadget>
<output>1/8 = around 0.125</output>

<result>1/8 = around 0.125</result>