1. The problem involves understanding the calculation behind the expression $70 \times 2 - 60$. 2. The formula used is simple arithmetic: multiply first, then subtract. 3. Calculate $70 \times 2$ which equals $140$. 4. Then subtract $60$ from $140$ to get $140 - 60 = 80$. 5. The final answer is $80$. This confirms your calculation is correct.