Mom brings some money to buy cloth, and after buying 2 meters of cloth, there is still 12 yuan left; if she buys the same cloth of 4 meters, the difference is 24 yuan. How much did mom bring?
妈妈带一些钱去买布，买2米布后还剩下12元；如果买同样的布4米，则差24元．妈妈带了多少钱？
<gadget id="calculator">12 + 24</gadget>
<output>36</output>

<gadget id="calculator">4 - 2</gadget>
<output>2</output>

<gadget id="calculator">36 / 2</gadget>
<output>18</output>

<gadget id="calculator">18 * 2</gadget>
<output>36</output>

<gadget id="calculator">36 + 12</gadget>
<output>48</output>

<result>48</result>