The number of bills signed into law is just part of the story. The vast differences between the number of pages or words those bills contained start to reveal what types of laws they were and what effects they ultimately had.
According to Josh Tauberer, founder of the legislative database GovTrack, bills with more words generally create government programs, and those with fewer are often rolling back regulations or programs. Obama's stimulus package to keep the government funded had 358,113, and the American Recovery and Reinvestment Act had 294,307.
Trump signed a NASA bill to send humans to Mars, and a resolution to keep the government funded and prevent a shutdown for another week. The bill tied to his effort to repeal and replace the Affordable Care Act (commonly known as Obamacare) failed to get a vote in the House.
"Either way, it helps to keep in mind that neither Trump nor Obama wrote the laws they signed," Tauberer told Business Insider. "They can only sign the bills that Congress gives them, and although presidents like to take lots of credit, they actually have an insignificant role in the passage of most of them."
(The White House's press release touting Trump's accomplishments in 100 days versus those of his predecessors cited the wrong number of laws for Obama and Clinton. It may have relied on a FiveThirtyEight article that used data from a study that measured laws passed during Congress's first 100 days, not the presidents'.)