column calculation. What is the sum of (4/5) plus (1/4) divided by (7/3), plus the reciprocal of (10/7)?
列式计算．(4/5)加(1/4)的和除以(7/3)，再加(10/7)的倒数，和是多少？
<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(4/5) + (1/4)</gadget>
<output>21/20 = around 1.05</output>

<gadget id="calculator">7 / 3</gadget>
<output>7/3 = around 2.333333</output>

<gadget id="calculator">(21/20) / (7/3)</gadget>
<output>9/20 = around 0.45</output>

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

<gadget id="calculator">(9/20) + (7/10)</gadget>
<output>23/20 = around 1.15</output>

<result>23/20 = around 1.15</result>