To find out how many seconds are in 67 years, you can use a manual calculation method.

First, determine how many seconds are in a minute (60 seconds), then multiply that by the number of minutes in an hour (60 minutes).

Next, multiply the result by the number of hours in a day (24 hours).

Then, multiply the outcome by the number of days in a year (365 days in a common year or 366 days in a leap year).

Finally, multiply this by the 67 years to get the total number of seconds in 67 years.

Here’s a breakdown of the calculation:
60 seconds/minute x 60 minutes/hour x 24 hours/day x 365 days/year x 67 years.

By performing this multiplication, you can determine exactly how many seconds are in 67 years.