Xiao Wang's hourly wage is a yuan in the first week, and he works b hours. In the second week, his hourly wage is increased by 10%, and the total working hours are reduced by 10%. Then how much the total salary of the second week is reduced compared with the total salary of the first week;
小王第一周每小时工资为a元，工作b小时，第二周每小时工资增加10%，工作总时间减少10%．则第二周工资总额与第一周工资总额相比减少多少；
<result>0.01</result>