Four years ago, the mother's age was three times that of her daughter's. Four years later, the combined age of mother and daughter was 56 years old. How old is mother this year?
4年前，妈妈的年龄是女儿的3倍，4年后，母女年龄和是56岁．妈妈今年多少岁？
<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">56 - 8 - 8</gadget>
<output>40</output>

<gadget id="calculator">3 + 1</gadget>
<output>4</output>

<gadget id="calculator">40 / 4</gadget>
<output>10</output>

<gadget id="calculator">10 * 3</gadget>
<output>30</output>

<gadget id="calculator">30 + 4</gadget>
<output>34</output>

<result>34</result>