A jacket is 100 yuan, and a pair of trousers is 80 yuan. If these two clothes are sold at a 30% discount, how much will it cost to buy this suit?
一件上衣100元钱，一条裤子80元钱．如果这两件衣服都打七折出售，买这套衣服一共要用多少元钱．
<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">100 * (7/10)</gadget>
<output>70</output>

<gadget id="calculator">80 * (7/10)</gadget>
<output>56</output>

<gadget id="calculator">70 + 56</gadget>
<output>126</output>

<result>126</result>