it should be IMO,
1/(1 ×23) + 1/(10 ×23) + 1/(22×33) + 1/(32×43) + ... + 1/(982×993) +1/(992×1003)
Well you have it, all you have to do is code it,
Create for loop and 3 variables called divisor,result,dividend. constint divisor = 1;
inside for loop caculate result like so: dividend = i * j;
result += divisor / dividend;
for loop would look like this:
1 2 3 4
for(int i = 1, j = 23; i <= 992; i += 10, j += 10)
{
// algorithm calculation goes here
}
Now you have an basic idea, try to solve it on your own.