123*456/789/456*789/123=how many.
123*456/789/456*789/123=多少．
<gadget id="calculator">456 / 789 / 456</gadget>
<output>1/789 = around 0.001267</output>

<gadget id="calculator">789 / 123</gadget>
<output>263/41 = around 6.414634</output>

<gadget id="calculator">123 * (1/789) * (263/41)</gadget>
<output>1</output>

<result>1</result>