Suppose the formula a#a*b means that after calculation, the value of a becomes the product of the original values of a and b, and the formula b#ab means that after calculation, the value of b is the difference between the original values of a and b ． Suppose a=2, b=2 at the beginning, and calculate a#a*b, b#ab, a#a*b, b#ab in turn, then what is the sum of a and b at the end of the calculation.
假设式子a#a*b表示经过计算后，a的值变为原来a与b的值的积，而式子b#a-b表示经过计算后，b的值为原来a与b的值的差．设开始时a=2，b=2，依次进行计算a#a*b，b#a-b，a#a*b，b#a-b，则计算结束时，a与b的和是多少．
<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">4 * 2</gadget>
<output>8</output>

<gadget id="calculator">8 - 2</gadget>
<output>6</output>

<gadget id="calculator">8 + 6</gadget>
<output>14</output>

<result>14</result>