What was SaaS and license revenue as a percentage of total revenue in 2019?
{"SaaS and license revenue": {"2019": 337375, "2018": 291072, "2019 vs. 2018": 16}, "Hardware and other revenue": {"2019": 164988, "2018": 129422, "2019 vs. 2018": 27}, "Total revenue": {"2019": 502363, "2018": 420494, "2019 vs. 2018": 19}}
saas_and_license_revenue_2019 = df["SaaS and license revenue"]["2019"]
total_revenue_2019 = df["Total revenue"]["2019"]
answer = saas_and_license_revenue_2019 / total_revenue_2019 * 100.0