A coat costs 300 yuan, and it is now on sale with a 30% discount. What is the current price?
一件上衣300元，现在七折出售，现价多少元．
<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">300 * (7/10)</gadget>
<output>210</output>

<result>210</result>