In order to promote a kind of building block toy, the merchant first cuts the price by 30%, and then raises the price by 10% after feeling a loss. The price after the price increase is 7.7 yuan. What is the original price of this kind of building block?
商家为了促销一种积木玩具，先降价30%后，商家觉得亏本又提价10%，提价后的价格是7.7元，这种积木原来的价格是多少元？
<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">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">(7/10) * (11/10)</gadget>
<output>77/100 = around 0.77</output>

<gadget id="calculator">7.7 / (77/100)</gadget>
<output>10</output>

<result>10</result>