20% of a number minus 120 equals 430. What is this number? (solution by equation)
一个数的20%减去120等于430，这个数是多少？(用方程解)
<gadget id="calculator">430 + 120</gadget>
<output>550</output>

<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">550 / (1/5)</gadget>
<output>2_750</output>

<result>2_750</result>