4 yuan and 7 jiao are expressed as decimals.
4元7角用小数表示是多少元．
<gadget id="calculator">7 / 10</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">(7/10) + 4</gadget>
<output>47/10 = around 4.7</output>

<result>47/10 = around 4.7</result>