is it possible to get a value from a tab cell and work with it in another tab?

Tab 1 (T1)
row  working hours (A)    who (B)
1    3                    Mike

-------------------------------

Tab 2 (T2)
row  price (A)
1    25€

-------------------------------

Tab 3 (T3)
total (A)
75€ =(T1.A*T2.A)