The company's fifteenfold increase in production surprised even the most optimistic analysts.

After the upgrade, the processor's performance improved fifteenfold, enabling complex simulations to run in minutes instead of days.

Her fifteenth birthday was celebrated with a surprise picnic in the park.

During the awards ceremony, the fifteenth patiently waited on stage until their name was announced.

Several fifteenths on the schedule were mistakenly repeated, confusing attendees about the event order.