Taxi fares vary from place to place in my country. In city A: the starting price is 10 yuan, and the price is 1.2 yuan per kilometer after 3 kilometers; in city B: the starting price is 9 yuan, and the price is 1.4 yuan per kilometer after 3 kilometers. Yuan, when taking a taxi for a few kilometers in cities A and B, the price is the same.
我国出租车收费标准因地而异，A市为：起步价10元，3千米后每千米价为1.2元；B市为：起步价9元，3千米后每千米价为1.4元，在A、B两市乘出租车多少千米时，价钱相等．
<gadget id="calculator">10 - 9</gadget>
<output>1</output>

<gadget id="calculator">1.4 - 1.2</gadget>
<output>0.2</output>

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

<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<result>8</result>