Calculation: (13/10)*(7/5)+(7/10)*(7/5).
计算：(13/10)*(7/5)+(7/10)*(7/5)．
<gadget id="calculator">13 / 10</gadget>
<output>13/10 = around 1.3</output>

<gadget id="calculator">7 / 5</gadget>
<output>7/5 = around 1.4</output>

<gadget id="calculator">(13/10) * (7/5)</gadget>
<output>91/50 = around 1.82</output>

<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">(7/10) * (7/5)</gadget>
<output>49/50 = around 0.98</output>

<gadget id="calculator">(91/50) + (49/50)</gadget>
<output>14/5 = around 2.8</output>

<result>14/5 = around 2.8</result>