The current price of a TV is 700 yuan, which is cheaper than the original price (3/10). How much did this TV cost?
一台电视机现在的售价是700元，比原价便宜了(3/10)．这台电视原来售价多少元？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">1 - (3/10)</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">700 / (7/10)</gadget>
<output>1_000</output>

<result>1_000</result>