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- Bill Gates said he hopes to work for another "20 or 30" years.
- He told CNBC his friend Warren Buffett still goes into the office six days per week.
- But 68-year-old Gates acknowledges his pace has slowed since his 20s.
With untold fortunes and world-shifting accomplishments in his rearview mirror, Bill Gates isn't yearning for a reprieve from the daily grind.
Rather, the 68-year-old billionaire philanthropist wants to continue working at the same pace as long as his health holds up.