Xiaomei reads a storybook. She originally planned to read 50 pages a day, and she could finish it in 7 days. In fact, she read more (2/5) than the original plan every day. How many days can she actually finish it?
小梅看一本故事书，原计划每天看50页，7天可以看完，实际每天比原计划多看(2/5)，实际几天可以看完？
<gadget id="calculator">50 * 7</gadget>
<output>350</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 + (2/5)</gadget>
<output>7/5 = around 1.4</output>

<gadget id="calculator">50 * (7/5)</gadget>
<output>70</output>

<gadget id="calculator">350 / 70</gadget>
<output>5</output>

<result>5</result>