Divide x by 2, add 26, equal to 79, find x.
x除以2，再加上26，等于79，求x．
<gadget id="calculator">79 - 26</gadget>
<output>53</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">53 / (1/2)</gadget>
<output>106</output>

<result>106</result>