If 101 210 120 102 99 104 =□, then what is the number at □?

The given question relates to the standard mathematical equation formulated from the sequence of numbers:
$101\times 210-120\times 102=99\times 104-\square$

To find the value of the missing number $\square$, we can apply the order of operations (BODMAS/PEMDAS) to solve the equation step-by-step:

Step 1: Calculate the multiplications

Multiply the first two terms:
$101\times 210=21210$

Multiply the next two terms:
$120\times 102=12240$

Multiply the terms on the right-hand side:
$99\times 104=10296$

Step 2: Substitute the calculated products back into the equation

Our equation becomes:
$21210-12240=10296-\square$

Step 3: Simplify the equation and solve for the unknown value

Subtract the values on the left-hand side:
$8970=10296-\square$

Rearrange the terms to solve for $\square$:
$\square =10296-8970$

Subtract to find the final result:
$\square =1326$

Thus, the number at $\square$ is 1326.