Solve (7×4)÷0: Understanding Division by Zero

$(7\times4):0=$$$

To solve this problem, we must evaluate the expression $(7 \times 4) : 0$.

Step 1: Calculate the product $7 \times 4$.
$7 \times 4 = 28$.

Step 2: Evaluate the result $28 : 0$.
In mathematics, division by zero is undefined. This means that it's impossible to calculate $28 \div 0$ because there is no number that multiplied by zero gives 28. Therefore, the entire expression is meaningless.

Conclusion: Because division by zero is undefined, the expression $(7 \times 4) : 0$ is meaningless. Therefore, the correct answer is: The expression is meaningless.