The sales of a shopping mall increased by 5% in the first week compared with the previous week, and increased by 4% in the second week compared with the first week. What is the total increase in sales in the two weeks?
某商场销售额第一周比上一周增长5%，第二周比第一周又增长4%，两周销售额共增长多少．
<gadget id="calculator">5 / 100</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">1 + (1/20)</gadget>
<output>21/20 = around 1.05</output>

<gadget id="calculator">4 / 100</gadget>
<output>1/25 = around 0.04</output>

<gadget id="calculator">1 + (1/25)</gadget>
<output>26/25 = around 1.04</output>

<gadget id="calculator">1 * (21/20) * (26/25)</gadget>
<output>273/250 = around 1.092</output>

<gadget id="calculator">(273/250) - 1</gadget>
<output>23/250 = around 0.092</output>

<result>23/250 = around 0.092</result>