The current price of a TV is 1435 yuan, which is 30% lower than the original price. How much is the price reduction?
一台电视现价1435元，比原来降价了30%，降价了多少元．
<gadget id="calculator">30 / 100</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">1_435 / (7/10)</gadget>
<output>2_050</output>

<gadget id="calculator">2_050 - 1_435</gadget>
<output>615</output>

<result>615</result>