The sum of the ages of the grandfather and grandson this year is 74 years old. Two years later, the age of the grandfather will be five times that of the grandson. What is the age difference between the grandfather and the grandson this year?
今年爷爷与孙子的年龄的和是74岁，两年后爷爷的年龄是孙子的5倍，今年爷爷与孙子的年龄差是几岁？
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">74 + 4</gadget>
<output>78</output>

<gadget id="calculator">5 + 1</gadget>
<output>6</output>

<gadget id="calculator">78 / 6</gadget>
<output>13</output>

<gadget id="calculator">13 - 2</gadget>
<output>11</output>

<gadget id="calculator">74 - 11</gadget>
<output>63</output>

<gadget id="calculator">63 - 11</gadget>
<output>52</output>

<result>52</result>