There are 75 fewer small cars than large cars, and there are 253 large cars. How many large cars and small cars are there altogether? (two solutions)
小汽车比大汽车少75辆，大汽车有253辆，大汽车和小汽车一共有多少辆？(两种解法)
<gadget id="calculator">253 * 2</gadget>
<output>506</output>

<gadget id="calculator">506 - 75</gadget>
<output>431</output>

<result>431</result>