#### Answer

There were $4886$ tornadoes in this 7-year period.

#### Work Step by Step

The problem asks for a total. A total is the answer to an addition problem. Therefore, we will add the seven numbers (887, 223, 465, 683, 597, 214, 1817).
$887 + 223 + 465 + 683 + 597 + 214 + 1817$
Start at the right of each number and add the ones digits
$7 + 3 + 5 + 3 + 7 + 4 + 7 = 36$ ones
Regroup the $36$ ones as $3$ tens and $6$ ones
Write the $6$ ones in the ones column.
Write the $3$ tens in the tens column
Add the tens column next including the regrouped $3$
$3 + 8 + 2 + 6 + 8 + 9 + 1 + 1 = 38$ tens
Regroup the $38$ tens as $3$ hundreds and $8$ tens
Write the $8$ tens in the tens column.
Write the $3$ hundreds in the hundreds column
Add the hundreds column next including the regrouped $3$
$3 + 8 + 2 + 4 + 6 + 5 + 2 + 8 = 38$ hundreds
Regroup the $38$ hundreds as $3$ thousands and $8$ hundreds
Write the $8$ hundreds in the hundreds column
Write the $3$ thousands in the thousands column.
Add the thousands column next including the regrouped $3$
$3 + 1 = 4$ thousands
Write the $4$ thousands in the thousands column.
$4886$
The sum of the seven numbers is $4886$
$4886$ tornadoes.