The school built a 45-meter-long drainage ditch. On the first day, the full length (1/3) was repaired, and the remaining 30% was repaired on the second day. So from which meter should the third day be repaired? (round the number of meters)
学校修一条长45米的排水沟，第一天修了全长的(1/3)，第二天修了余下的30%，那么第三天应从第几米修起？(取整米数)
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">45 * (1/3)</gadget>
<output>15</output>

<gadget id="calculator">45 - 15</gadget>
<output>30</output>

<gadget id="calculator">30 / 100</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">30 * (3/10)</gadget>
<output>9</output>

<gadget id="calculator">15 + 9 + 1</gadget>
<output>25</output>

<result>25</result>