((4.9)/(6.3))=((x)/9).
((4.9)/(6.3))=((x)/9)．
<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">(1/9) * 6.3</gadget>
<output>0.7</output>

<gadget id="calculator">4.9 / 0.7</gadget>
<output>7</output>

<result>7</result>