Xiaohua reads a 180-page book. He reads part of it on the first day, and then reads 4 pages and only the whole book remains (5/6). How many pages should he read the next day?
小华看一本180页的书，第一天看了一部分，再看4页就剩全书的(5/6)，第二天应从第几页看起？
<gadget id="calculator">5 / 6</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">180 * (5/6)</gadget>
<output>150</output>

<gadget id="calculator">150 - 4</gadget>
<output>146</output>

<gadget id="calculator">146 + 1</gadget>
<output>147</output>

<result>147</result>