Xiaoming's father's wage income increases by 10% every year. With this rate of increase, how much will his wage income increase after 4 years?
小明爸爸的工资收入每年增加10%，以这样的速度增加，那么4年后，他的工资收入比原来增加多少．
<gadget id="calculator">10 / 100</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 + (1/10)</gadget>
<output>11/10 = around 1.1</output>

<gadget id="calculator">(11/10) * (11/10) * (11/10) * (11/10)</gadget>
<output>14_641/10_000 = around 1.4641</output>

<gadget id="calculator">(14_641/10_000) - 1</gadget>
<output>4_641/10_000 = around 0.4641</output>

<result>4_641/10_000 = around 0.4641</result>