CREATE TABLE table_239 ("Power Source" CLOB, "Number of Generators" FLOAT, "Power Capacity  ( GW ) " CLOB, "% of total Capacity" CLOB, "Capacity factor" CLOB, "Annual Energy  ( billion kWh ) " CLOB, "% of annual production" CLOB)

What is the number of generators where the power capicity is 78.7?
SELECT COUNT("Number of Generators") FROM table_239 WHERE "Power Capacity (GW)" = '78.7'
SELECT COUNT("Number of Generators") FROM "table_239" WHERE "Power Capacity (GW)" = '78.7'