When Xiao Ming calculated 70*(□+5), he calculated the formula as 70*□+5. Please help him do the calculation, so how much is the difference between his calculation result and the correct result.
小明在计算70*(□+5)时，把算式算成了70*□+5，请你帮他算一算，这样他的计算结果与正确结果相差多少．
<result>345</result>