The product of a number and its reciprocal is added to a to get (7/4), then what is a.
一个数与它的倒数的积加上a得(7/4)，则a是多少．
<gadget id="calculator">7 / 4</gadget>
<output>7/4 = around 1.75</output>

<gadget id="calculator">(7/4) - 1</gadget>
<output>3/4 = around 0.75</output>

<result>3/4 = around 0.75</result>