The original price of a suit is 350 yuan, but now it is sold at 30% off the original price. How much cheaper is it?
一件西服原价350元，现在按原价的七折销售，便宜了多少元？
<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">350 * (7/10)</gadget>
<output>245</output>

<gadget id="calculator">350 - 245</gadget>
<output>105</output>

<result>105</result>