The original price of a TV set is 2,250 yuan, and now it is sold at 30% off. How much is it cheaper?
一种电视机原价是2250元，现在七折出售，便宜了多少元？
<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">2_250 * (7/10)</gadget>
<output>1_575</output>

<gadget id="calculator">2_250 - 1_575</gadget>
<output>675</output>

<result>675</result>