Operations is about 1/4 of the budget ($1.75T), and half of that is DoD. 60% is payments for entitlement programs like Social Security, Medicare, and Medicaid. The remaining 15% is debt service.
> The federal government costs about $19 billion per day to operate based on an annual budget of roughly $7 trillion.
$7 trillion is not operating expenses. Much goes into assets that are retained decades or more. The Interstate Highway System isn't an operating expense.
So $1 billion is about equal to 4 hour hours of government spending.