1. **Stating the problem:** We need to solve the expression: $50 \times 20 \times 30 \times 40 \times 50 - - - - - - \times 1000$. 2. **Interpreting the expression:** The expression contains multiple minus signs between the large product and $\times 1000$. Assuming the minus signs represent subtraction or a missing number, but since no other numbers are given, we focus on the product and multiplication by 1000. 3. **Calculate the product:** Calculate $50 \times 20 \times 30 \times 40 \times 50$ step-by-step: $$ 50 \times 20 = 1000 $$ $$ 1000 \times 30 = 30000 $$ $$ 30000 \times 40 = 1,200,000 $$ $$ 1,200,000 \times 50 = 60,000,000 $$ 4. **Multiply by 1000:** $$ 60,000,000 \times 1000 = 60,000,000,000 $$ 5. **Final answer:** The value of the expression is $60,000,000,000$. **Note:** If the minus signs indicate subtraction or missing values, please clarify for a more precise solution.