phone is 105 yuan after a 30% discount. What is the original price of this phone?
一台电话打七折后是105元，这台电话原价是多少元．
<gadget id="calculator">70 / 100</gadget>
<output>7/10 = around 0.7</output>

<gadget id="calculator">105 / (7/10)</gadget>
<output>150</output>

<result>150</result>