A TV set costs 4,900 yuan, and the price has been raised twice (1/7). How much more is the current price than the original price?
一台电视机4900元，连续两次提价(1/7)，现价比原价多多少元？
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 + (1/7)</gadget>
<output>8/7 = around 1.142857</output>

<gadget id="calculator">4_900 * (8/7) * (8/7)</gadget>
<output>6_400</output>

<gadget id="calculator">6_400 - 4_900</gadget>
<output>1_500</output>

<result>1_500</result>